EP 0231600 A1 19870812 - Current limiting circuit interrupter.
Title (en)
Current limiting circuit interrupter.
Title (de)
Strombegrenzungsschalter.
Title (fr)
Interrupteur de circuit limitant le courant.
Publication
Application
Priority
- JP 12070386 A 19860526
- JP 26425385 A 19851125
Abstract (en)
A circuit interrupter includes an arc extinction assembly [10,70,110] for magnetically driving or blowing out an arc formed between a stationary contact [2,62,102] and a movable contact [3,63,103]. The assembly comprises a pair of coaxial windings [12,72,112] which are disposed in proximity to the contacts so that the internal lines of magnetic force generated by and passing inside of the windings can act directly on the arc for magnetically driving the arc in one direction. A magnetic flux diverting yoke [40,40A,90,140,140A] is provided in association with the windings [12,72,112] to diverse therethrough the external lines of magnetic force generated by and passing outside of the windings such that the arc and a portion of the movable contact arm [4,64,104] carrying the same will not be under the influence of the external lines of magnetic force even when the contact separation proceeds to a stage where the arc is extended past the region which is totally under the influence of the internal lines of magnetic force. Otherwise, the external lines of magnetic force would pass through the arc and the portion of the movable contact arm [4,64,104] in the opposite direction to the internal lines of magnetic force, causing the adverse magnetic effect of retarding the arc extinction and contact separation.
IPC 1-7
IPC 8 full level
H01H 9/30 (2006.01); H01H 9/34 (2006.01); H01H 9/44 (2006.01); H01H 77/10 (2006.01)
CPC (source: EP US)
H01H 9/302 (2013.01 - EP US); H01H 9/342 (2013.01 - EP US); H01H 9/44 (2013.01 - EP US); H01H 77/108 (2013.01 - EP US); H01H 2009/305 (2013.01 - EP US)
Citation (search report)
- [A] US 4491705 A 19850101 - HAYASHI HIDEO [JP], et al
- [A] US 2555799 A 19510605 - KARL LERSTRUP
- [A] US 3483343 A 19691209 - HEFT ELDON B
- [A] DE 3334108 A1 19850404 - SIEMENS AG [DE]
- [A] DE 2704160 A1 19780803 - BBC BROWN BOVERI & CIE
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0231600 A1 19870812; EP 0231600 B1 19910807; DE 3680781 D1 19910912; US 4743720 A 19880510
DOCDB simple family (application)
EP 86309191 A 19861125; DE 3680781 T 19861125; US 92836286 A 19861110